Warp-thread-tension device for dressers



Jan. 1925. 1,522,578

\ G. D. DE GRANDPRE WARP THREAD TENSIONDEVICE FOR DRESSERS- Filed Aug. 4. 1924 IN 125m TUE-E AI IZUHNEY latented Jan. 13, 1925.

UNITED STATES GEORGE D. DE GRANDPRE, OF PRQVIDENCE, RHODE ISLAND.

WARP-THREAD-TENSION DEVICE FOR DRESSERS.

Application filed August 4, 1924. Serial No. 729,953.

1 '0 all whom it may concern:

Be it known that I, .Gnonen D. on GRAND- rnu, a citizen of the United States, residing at Providence, in the county of Providence and State of Rhode Island, have invented a new and useful Improvement in Tarp- Thread-Tension Devices for Dressers, of which the following is a specification.

In the usual construction and operation of warp dressing machines, as heretofore, the warp threads, usually e to 500 in number, come from the creel or spool rack to the dresser size rolls. From the size rolls the warp threads are carried back and forth around rolls at each end of the dresser and over steam coils to the upper front roll, which is rotatably supported in a fixed position in the machine. The warp threads now go from this upper front roll, under tension, to the reel on which they are wound, forming one section of warp threads on the The reel is then moved transversely the distance of one section of warp threads and these operations are repeated until the entire length of the reel is filled with sections of warp threads. The sections of warp threads now go to the beamer and are all wound on to the warp beam simultaneously. If the sections of warp threads on the reel vary in tension and height there will be a corresponding variation in the tension and height of the warp threads on the warp beam, thereby causing an imperfect weave in the cloth. In order to keep the tension of the warp threads, from the dresser to the reel, as uniform as possible, the operator tightens or loosens the belt on the reel, as he thinks the same is required.

My invention has reference to an improvement in warp dressing machines and more particularly to an improvement in warp thread tension devices for dressing machines.

The object of my invention is to provide the reel belt of a warp dresser with a warp thread tension device, whereby the belt may be adjusted to give any required tension on the warp threads, thereby eliminating the factors of chance and more or less skill or judgment of the operator, in adjusting the tension of the reel belt.

A further object of my invention is to simplify the construction of such a warp thread tension device, thereby reducing the cost of installation and maintenance.

My invention consists in the peculiar and novel construction and operation of a warp thread tension device for warp dressers, said warp thread tension device for warp dressers having details of construction, as will be more fully set forth hereinafter and claimed.

Figure 1 is an end View :of the reel member of .a dresser showing the same provided with my improved warp thread tension device.

Figure 2 is a side view of the warp thread tension device.

Figure 3 is a top plan View of thewarp thread tension device.

Figure 4 is a face view of one of the tension adjusting members, and

Figure 5 is a sectional view through the tension adjusting member, taken on line 5, 5 of Figure 4.

Figures 2 and 8 are enlarged and Figures 4; and 5 are still further enlarged to more clearly show my invention. 7

In the drawing, 6 indicates a reel of a warp dresser and 7 my improved warp thread tension device.

The reel 6 is of the usual construction, it is rotatably supported by a center shaft 8 which is rotatably supported in a bearing in each end frame 9. Each end of the reel 6 is formed into a large pulley 10 operatively connected to a small top pulley 11 by a belt 12. The small top pulley 11, is fixed to a top shaft 13 rotatably supported at each end in a bearing in an end frame 9. On the top shaft 13 is fixed a driving pulley 14: and this pulley 14L is connected by a driving belt 15, to a driving pulley in the warp dresser member of the warp dressing machine, not shown. The end frame 9 also has a vertical slot 16, adjacent the top of the frame, as shown in Figure 1. The reel 6 is slidably supported on rails on the floor in the usual way.

My improved warp thread tension device 7 for dressers is used one at each end of the reel. As both have the same construction a description of one will answer for both.

In the preferred form the tension device consists of an arm 17 rigidly secured at its inner end to the end frame 9, by a bolt 18 through the slot 16, in the end frame 9. A shaft 19 is rigidly secured at one end to the outer end of the arm 17 by a nut 20 and to this shaft 19 is pivotally secured at their inner ends two pulley supporting arms 21. 21. A shaft 22 is secured to the outer ends of the arms 21, 21 and this shaft rotatably supports intermediate the arms. 21, 21, a grooved pulley 23, in a position for the pulley 23 to rest on the belt 12, as shown 111 Figure 1. Secured to the outer end of the outside pulley arm 21 and pivotally secured to the shaft 19 is an outstanding tension arm 24 having V shaped notches 25, 25 in its upper edge and a scale 26 on its outer face, said scale 26 consisting of lines and numerals, as shown in Figure 2. Adjustably supported on the tension arm 24 are tension adjusting members 27, 27, each tension adjusting member 27 being in the form of a flat disk having a radial slot 28 for the tension arm 24. The radial slot 28 has an inner V shaped end 29, which enters a V shaped notch 25 in the upper edge of the tension arm 24. The tension device is supplied with a number of the tension members 27, 27, each being of a different thickness, and these tension members may be numbered for convenience of record.

In the operation of my improved Warp thread tension device for dresser reels, the movable parts supporting the pulley 23 of the device are of a predetermined weight andthis weight on the belt 12 is slightly below the weight required to give a minimum tension on the belt 12. The required tension on the belt 12 for different counts of warp threads is now obtained by placing one or more of the tension members 27, 27 on the tension arm 24 and moving the tension members back and forth on the tension arm until the required tension on the belt 12, is obtained. By having the tension members 27, 27 of varying thicknesses and by placing them in various positions on the tension arm 24, the exact tension required on the belt 12, may be obtained. When the exact tension is obtained for a certain count of warp thread the reading of the scale 26 with the numbers of the tension members 27, 27 used, may be set down as a record, for future use.

Having thus described my invention I claim as new V 1. In a warp dressing reel having a frame, a large pulley on the reel, a shaft, a small pulley on the shaft, a belt connecting the large and small pulleys, means for operating the shaft, a warp thread tension device having an arm, means for securing the arm to the reel frame, a shaft fixed to the arm, pulley arms pivotally secured to the shaft, a pulley rotatably secured to the pulley arms and resting on the reel belt, a tension arm on one of the pulley arms and having a scale and tension adjusting members on the tension arm, said tension adjusting members being in the form of disks of varying thicknesses, for the purpose as described. 7

2. A warp thread tension device for warp dressing reels comprising an arm, means for securing the arm to a reel frame, a shaft fixed to the arm, pulley arms pivotally secured to the shaft, a pulley rotatably secured to the pulley arms and adapted. to rest on the reel belt, a tension arm secured to one of the pulley arms and pivotally connected to the shaft, said tension arm having notches in its upper edge and a scale consisting of lines and numerals on its outer face, and tension members on the tension arm, said tension members being in the form of disks of varying thicknesses, each tension member having a radial slot terminating in a V shaped end, for the purpose as described.

In testimony whereof, I have signed my name to this specification.

GEORGE D. DE GRANDPRE. 

